The next steps will depend on the reason Google gave you for the disapproval. You should receive an email from Google explaining the disapproval reason.
If it is because you already have a Google Publisher account, you will receive an email from Google asking you to confirm whether you have closed your existing account(s) or would like to proceed using that existing account.
If you have been denied because of Google Policies, then if you have a named Account Manager/ representative at Ezoic, please contact them.